<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Popup</title>
</head>
<style>
    .button {
        width: 200px;
        display: inline-block;
        padding: 10px 20px;
        font-size: 16px;
        font-weight: bold;
        text-align: center;
        text-decoration: none;
        color: #fff;
        background-color: #007bff;
        border: 1px solid #007bff;
        border-radius: 4px;
        cursor: pointer;
    }
    </style>
<body>
  <a  href="http://127.0.0.1:8787/index/export" id="export-btn" class="button">导出CSV</a>
  <script src="popup.js"></script>
</body>
</html>